Swallowed, degraded or washed away.
How convenient for Zimmerman that all of the universe's forces lined up for him to get away with murder. He swallowed his blood from his battered nose through a barrage of punches and head slamming (or do I have that backwards?). The blood that splattered on Trayvon degraded. Oh, and the tissue from his injuries and Trayvon's prints and dna on the gun was washed away by the rain.
The fact that Zimmerman had no defensive wounds stretches the imagination. He didn't even scratch his elbow while retrieving his gun from its holder with a 160 pound teenager straddling him and either punching him in the face or banging his head on cement. The fact that there were no battle bruises on Trayvon stretches it further still.
Why did he talk so freely with police without an attorney? Because he was still fantasizing about being one of them. He knows enough about police shootings to know he didn't need an airtight alibi to get away with it if he was one of them.
While everyone is focusing on the prosecutor not proving beyond a doubt that Zimmerman killed Trayvon on purpose, they are overlooking the fact that there is no evidence to corroborate Zimmerman's version of what happened either. The two scratches on his head and the bump on his nose won't buy a bullet through the heart for me.